Rinse and drain the black beans.

Mash the black beans thoroughly using a fork or potato masher.

Cook rice until tender.

Finely chop the onion.

In a large bowl, combine the mashed black beans, cooked rice, chopped onion, beaten egg, and salsa.

Mix all ingredients together until well combined.

Spray a skillet with cooking spray and preheat over medium heat.

Spoon approximately 1/2 cup of the mixture into the hot skillet for each burger.

Flatten each portion to about 1/2 inch thickness.

Cook the burgers for 4-5 minutes on each side, until golden brown and heated through.

Serve immediately.